Lovell Co. purchased preferred stock in another company. The preferred stock's before-tax y eld was 8-40%. The corporate tax rate is 40%.Vhat is the a exclusion? (Round your final answer to two decimal places.) er-tax return on the preferred stock assuming a 70% dividend a. 7.17% b. 6.21% c. 8.72% d. 7.39% e. 9.2496 O